In this paper the notion of the derivative of the norm of a linear mapping in a normed vector space is introduced. The fundamental properties of the derivative of the norm are established. Using these properties, linear differential equations in a Banach space are studied and lower and upper estimates of the norms of their solutions are derived.
@article{104503, author = {Franti\v sek Tumajer}, title = {Derivative of the norm of a linear mapping and its application to differential equations}, journal = {Applications of Mathematics}, volume = {37}, year = {1992}, pages = {193-199}, zbl = {0767.34045}, mrnumber = {1157455}, language = {en}, url = {http://dml.mathdoc.fr/item/104503} }
Tumajer, František. Derivative of the norm of a linear mapping and its application to differential equations. Applications of Mathematics, Tome 37 (1992) pp. 193-199. http://gdmltest.u-ga.fr/item/104503/
Foundations of the theory of functions and functional analysis, (Russian). Czech translation, Praha, 1975. (1975)
Foundations of modern analysis, Academic Press, New York-London, 1960; Russian translation, Mir, Moscow. (1960) | MR 0120319